Annul

v. t.	1.	To reduce to nothing; to obliterate. [imp. & p. p. Annulled ( ); p. pr. & vb. n. Annulling.] Light, the prime work of God, to me's extinct. And all her various objects of delight Annulled. - Milton.
	2.	To make void or of no effect; to nullify; to abolish; to do away with; - used appropriately of laws, decrees, edicts, decisions of courts, or other established rules, permanent usages, and the like, which are made void by component authority. Do they mean to annul laws of inestimable value to our liberties? - Burke.

Verb	1.	annul - declare invalid; "The contract was annulled"; "void a plea" Synonyms: invalidate, nullify, void, quash, avoid
	2.	annul - annul by recalling or rescinding; "He revoked the ban on smoking"; "lift an embargo"; "vacate a death sentence" Synonyms: countermand, repeal, rescind, revoke, vacate, reverse, overturn, lift

abate, abolish, abrogate, abstract, annihilate, black out, blot out, bring to naught, bring to nothing, buffer, cancel, cancel out, come to nothing, counteract, counterbalance, countercheck, countermand, counterorder, delete, disannul, discharge, dispose of, dissolve, divorce, do away with, efface, eliminate, expunge, extinguish, frustrate, grant a divorce, grant an annulment, invalidate, make void, negate, negativate, negative, neutralize, nullify, obliterate, obtain a divorce, offset, outweigh, overbalance, override, overrule, part, put asunder, put away, quash, recall, recant, redress, remove, renege, repeal, rescind, retract, reverse, revoke, separate, set aside, split up, stultify, sue for divorce, suspend, thwart, undo, unmarry, untie the knot, vacate, vitiate, void, waive, wipe out, withdraw, write off